I was having trouble with my computer.

So I called Rick, the computer guy, to come over.

Rick clicked a couple of buttons, solved the problem and gave me a bill for a minimum service call.

As he was walking away, I called after him, "So, what was wrong?"

He replied, "It was an ID ten T error." I didn't want to appear stupid, but nonetheless inquired:

"An ID ten T error? What's that ... in case I need to fix it again?"

The computer guy grinned.... "Haven't you ever heard of an ID ten T error before?"

"No," I replied. "Write it down," he said, "and I think you'll figure it out."

So I wrote out .... I D 1 0 T